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Securities Sold Under Agreements to Repurchase - Summary of Remaining Contractual Maturity of Securities Sold Under Agreements to Repurchase (Detail) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings $ 179,416 $ 142,085
U.S. government-sponsored enterprises    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings 9,964 0
Mortgage-backed securities    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings 51,314 0
State and political subdivisions    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings 21,808 0
Other securities    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings 96,330 142,085
Overnight and Continuous    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings 179,416 142,085
Overnight and Continuous | U.S. government-sponsored enterprises    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings 9,964 0
Overnight and Continuous | Mortgage-backed securities    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings 51,314 0
Overnight and Continuous | State and political subdivisions    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings 21,808 0
Overnight and Continuous | Other securities    
Assets Sold under Agreements to Repurchase [Line Items]    
Total borrowings $ 96,330 $ 142,085